(CNN) - Homeland Security Secretary Janet Napolitano said on Sunday that the United States is “never going to be totally immune from threats” to its national security.
One day after the ninth anniversary of the September 11, 2001 terrorist attacks, Napolitano said in an interview with CNN’s Candy Crowley on "State of the Union" that the country is safer now than it was then, but added, “there is no 100 percent guarantee” that we won’t be attacked again.
Former Homeland Security Secretary Michael Chertoff echoed Napolitano’s assessment.
“We have reduced the risk, we have not eliminated the risk,” Chertoff told Crowley on Sunday.
Napolitano said a small number of American citizens have become “radicalized to violence,” but said that it is “not unique” to the United States, “nor was it unanticipated that that could occur.”